Can't a Guy Spend Money on a Lady Without Him Thinking of Getting Laid in Return?

                                     
            Here's a question from Articul8:

I was discussing with my friend today and he was gisting me about a female friend who asked him for a favour. Though he once asked the lady out but she declined his proposal. Later, the lady then asked him to lend her 20k and my friend was already making plans on how to get down with her cos she asked him for a favour.

Where is our sense of brotherly love? Must we always want something in return for every
favour rendered? Even if the lady wants to turn the guy to a 'maga' which may not be so. Isn't there a first time? What if she really needed the money for something that could change her life forever?

I'm just wondering... please share your thoughts. As a guy, would you always want something in return if your female friend, probably the one you once asked out asked you for a favour?